Nobody knows which QB will have sucess in the NFL. It is a odds game. Are we really going to send 3 first (actually 2), a second and a third to get to #2 ?!
Like I said in another post, I would rather draft both Jackson at 12 and Rudolph at 22 than giving the farm for a move up to #2.
It keeps the odds on your side and saves you precious draft picks.